I have an RL450 bought new and still running. I can't begin to count how many rounds in various calibers it's loaded; several thousand this year alone. I consider it the best reloader ever made by anyone at any price. you can have your 550 if you want; I'll stick with my manual operation. No double charges, no empty rounds, nada. When I get enough money saved up, I'm going to buy another used one for dedicated 223 and 380 loading. I've had a 650, SDB, and a 550. I sold them all and still load on the 450. I may not break the world record for amount loaded in an hour, but I'm retired and don't have anything but time. YMMV. CB.

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If you want your children to follow in your footsteps, be careful where you walk.
Beware the man that only owns one gun; he probably knows how to use it.
I just hope my ship comes in before my dock rots.